Air regulator for duplicating machine



Nov. 5, 1957 J. T. RICHARDSON 2,811,920

AIR REGULATOR FOR DUPLICATING MACHINE Filed April 5, 1954 ATTORN United States Patent AIR REGULATOR FOR DUPLICATING MACHINE Jesse T. Richardson, South San Francisco, Calif.

Application April 5, 1954, Serial No. 420,913

1 Claim. (Cl. 101-416) This invention relates to an air regulator for a duplicating machine and has particular reference to an attachment, adapted to be associated with a machine of the character described, that will prevent light bond or thin paper from adhering to rollers, drums, stencils, or other paper carrying or supporting elements of a reproduction machine.

The principal object of the invention is the provision of an air carrying medium, wherein the latter will effectively prevent the paper from adhering to the drum or the like during the rotation of the drum, and will most satisfactorily and efliciently direct the air treated paper to a suitable receptacle for the paper, after the paper has been subjected to the unique air treatment of the present attachment.

An additional object of the invention is the provision of a means for conveying the air supply to a paper carrying drum or the like that will effectively dry, in a minimum amount of time, the inked paper carried by the drum and being conveyed to a suitable depository.

A further object of the invention is the provision of an attachment of the character described that is simple in construction, economical to manufacture, positive in operation and highly efficient and serviceable in use.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a schematic view of the attachment constructed in accordance with my invention,

Fig. 2 is a longitudinal view partly in section and partly in elevation, of the air conveying and air dispensing tubes and associated parts, constructed in accordance with my invention,

Fig. 3 is a fragmentary perspective view of the perforated air supply tube,

Fig. 4 is an enlarged cross sectional view of the air diffusing tube,

Fig. 5 is a fragmentary prespective view of a proposed means for securing the air diffusing tube to a support for the tube, which support is adapted to be secured to a suitable portion of the duplicating machine, and

Fig. 6 is a fragmentary top plan view of Fig. 5.

It is a well known fact that in the use of duplicators used for printing, stencil work and the like, considerable difiiculty has been experienced because of the tendency of light bond and tissue that is being printed, to adhere to the rotating drum of the mimeograph and like machines, either due to static or other sources. Accordingly, to overcome this annoyance and inconvenience, I have devised the present simple expediency where the above recited annoyances have been readily overcome and whereby light bond and tissue can be most effectively handled.

In the accompanying drawing wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 7 designates a base or platform 2,811,920 Patented Nov. 5, 1957 for the duplicating machine, and the numeral 8 indicates the rotatable drum that travels in the direction of the arrows of Fig. 1. The numeral 9 designates paper of light bond or tissue that is being fed to the roller to thus be printed or mimeographed, and that is conveyed in printed or mimeographed form to the stacked form of the paper, 9. The air supply means can be positioned at any place in proximity to the printed paper, as the latter passes from the drum. Likewise the motor and driven fan 10 can be most conveniently located. In carrying out the present concept of the invention, I have illustrated a frame 11 having inwardly turned flanges 12 that are adapted to receive therebetween a slidable plate 13 to which is secured as at 14 the depending elbow 15 of an air dispensing tube 16 having spaced lines of perforations 17 and 18 therein. The lower ends of the flanges are preferably crimped as at 19 to thus retain the elbow retaining plate within the frame, the latter in turn being secured by a suitable fastening element 20 to the duplicating machine at any convenient securing position thereon.

The pliable air supply tube that conveys the air from the motor driven fan 10, is indicated by the numeral 21. This tube is connected at one end to the fan housing 22 and is secured at its opposite end to the elbow 15 of the air dispensing tube 16.

Since in the present form of the invention the dispensing tube is shown as extending from the frame or bracket across and above the point where the paper is dispensed or expelled from the drum, it will be obvious that the air, passing through the line of perforations 17, will, due to its downward flow, first prevent the light bond or tissue from adhering to the drum 8, and rotating therewith. The function of the perforations 18 is to continue the flight of the paper 8 while the paper is in suspension and free from the drum, and direct the paper towards the stack formation of the paper as indicated by the numeral 9. It is obvious that the influx of air and the periodical suspension of the paper in flight towards its destination will result in a quick drying of the inked paper, whether the latter be tissue, light bond, or a bond of a heavier character.

From the foregoing description considered in connection with the accompanying drawing, it will be obvious that my present invention can be readily and quickly attached to and can be associated with various types of duplicating machines, without in any respect necessitating the alteration of the present construction of the said machines.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the shape, size, material and arrangement of parts may be readily resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention, I claim:

In combination with a duplicating machine and the paper printing drum thereof, of an air-diffusing tube positioned in proximity to the drum, said tube having a pair of lateral longitudinal rows of spaced perforations therein, one row of perforations adapted to direct the flow of air to the printed side of the paper to overcome adhesion of the paper to the drum, the other row of perforations permitting the flow of air therethrough to convey the printed paper to a remote point from the drum, and motor driven means for supplying air to said tube, the tube being equipped with an elbow portion for connecting the same to the air supply means, means for mounting the perforated tube on the duplicating machine, said means including a frame equipped with inwardly turned flanges crimped at their lower ends, a plate 3 4 slidably mounted in the frame, and fastening means for 433,234 Cortrell July 29, 1890 securing the frame to the duplicating machine. 1,278,659 Howe Sept. 10, 1918 1,414,339 Cochrane May 2, 1922 References Cited in the file of this patent 1 05 504 Bradley Nov, 19 UNITED STATES PATENTS 5 2,138,17 Lang Nov. 29, 1938 2,398,288 Collins Apr. 9, 1946 333,879 Maxon Jan. 5, 1886 

